Siemens 3VL5763-1DC36-0AA0 Molded Case Circuit Breaker

The Siemens 3VL5763-1DC36-0AA0 is a molded case circuit breaker (MCCB) from the 3VL5 series, designed for main distribution and branch protection in low-voltage systems. It features an electronic trip unit with adjustable protection parameters and high breaking capacity.

Electrical Ratings

• Number of poles: 3

• Rated current (In): 630 A

• Rated voltage (Ue): 690 V AC (50/60 Hz)

• Insulation voltage (Ui): 800 V

• Impulse withstand voltage (Uimp): 8 kV

• Breaking capacity (Icu) at 415V: 50 kA

• Breaking capacity (Icu) at 690V: 20 kA

Electronic Trip Unit (ETU)

The breaker is equipped with an electronic trip unit type ETU (specifically, the 3VL ETU36). It provides adjustable overload protection (L function: Ir = 0.4-1 x In, tR = 0.5-20s) and short-circuit protection (I function: Ii adjustable 2-10 x In). The trip unit also includes a ground fault protection option (G function) which can be enabled or disabled via dip switches.

Mechanical Features

The 3VL5763-1DC36-0AA0 features a rotary handle with a clear ON/OFF indication. The breaker has a fixed version (non-pluggable) with terminals for box lugs or busbars. It supports front-mounted auxiliary contacts, shunt trips, undervoltage releases, and alarm switches. The mechanism is toggle-operated with a fast make/break action.

Indications and Communication

An optional LED indicator on the front shows trip status (thermal, short-circuit, or ground fault). The electronic trip unit can be equipped with a communication module (COM10) for PROFIBUS or Modbus RTU, allowing remote monitoring of currents, trip settings, and events.

Standards and Certifications

Complies with IEC 60947-2, UL 489 (for appropriate voltage), and CSA C22.2 No. 5. CE marked, CCC certified for Chinese market. The breaker is RoHS compliant. It has a protection degree IP20 (front panel) and IP00 on terminals.

Dimensions and Mounting

Dimensions (W x H x D): 140mm x 257mm x 110mm. Weight: 3.8 kg. Mounting: screw fixing on a mounting plate or DIN rail (with adapter). The breaker requires 50mm clearance on sides for cooling. Terminal tightening torque: 20 Nm for main terminals (M10 screw).

Ambient Conditions

Operating temperature: -25°C to +70°C (derating above 55°C). Storage: -40°C to +85°C. The electronic trip unit is operational down to -20°C. Relative humidity: 10-95% non-condensing. Altitude: up to 2000m without derating.

Typical Applications

This MCCB is used as main incoming breaker for industrial control panels, distribution boards, and machinery feeders. It protects cables, transformers, and motors against overloads and short circuits.

Accessories

Compatible accessories include: rotating handle (3VL9 8-series), motor operator (3VL9 5-series), shunt trip (3VL9 1-series), undervoltage release (3VL9 2-series), and auxiliary contact blocks (3VL9 3-series).

Conclusion

The Siemens 3VL5763-1DC36-0AA0 offers robust, adjustable protection for high-current applications, combining an electronic trip unit with high breaking capacity in a compact molded case design.